Keymanager 2 keys

Bitmask told me to report this info as a bug:

[2016-04-26 10:35:50] ERROR    - L#541  : leap.keymanager.keys:_repair_docs - BUG ---------------------------------------------------
[2016-04-26 10:35:50] ERROR    - L#543  : leap.keymanager.keys:_repair_docs - There is more than one doc of type OpenPGPKey-active:
[2016-04-26 10:35:50] ERROR    - L#524  : leap.keymanager.keys:log_active_doc - 	kwadronaut@leap.se: 1395693C17C29CE00824A45FC0DC102A2D01C2BE
[2016-04-26 10:35:50] ERROR    - L#524  : leap.keymanager.keys:log_active_doc - 	kwadronaut@leap.se: BCBFDB39133D58045461B45655ED6A49C7CB9489
[2016-04-26 10:35:50] ERROR    - L#553  : leap.keymanager.keys:_repair_docs - 
[2016-04-26 10:35:50] ERROR    - L#554  : leap.keymanager.keys:_repair_docs - [('leap/bitmask/app.py', 254, '', None), ('leap/bitmask/app.py', 245, 'start_app', None), ('multiprocessing/process.py', 130, 'start', None), ('multiprocessing/forking.py', 126, '__init__', None), ('multiprocessing/process.py', 258, '_bootstrap', None), ('multiprocessing/process.py', 114, 'run', None), ('leap/bitmask/backend_app.py', 94, 'run_backend', None), ('leap/bitmask/backend/backend.py', 173, 'run', None), ('site-packages/twisted/internet/base.py', 1194, 'run', None), ('site-packages/twisted/internet/base.py', 1203, 'mainLoop', None), ('site-packages/twisted/internet/base.py', 798, 'runUntilCurrent', None), ('site-packages/twisted/internet/defer.py', 393, 'callback', None), ('site-packages/twisted/internet/defer.py', 501, '_startRunCallbacks', None), ('site-packages/twisted/internet/defer.py', 588, '_runCallbacks', None), ('leap/keymanager/openpgp.py', 849, '_repair_and_get_doc', None), ('leap/keymanager/keys.py', 538, '_repair_active_docs', None), ('leap/keymanager/keys.py', 554, '_repair_docs', None)]
[2016-04-26 10:35:50] ERROR    - L#555  : leap.keymanager.keys:_repair_docs - BUG (please report above info) ------------------------

(from redmine: created on 2016-04-26, relates #6658 (closed), relates #8165 (closed))